#include "stdio.h"

int main()
{
    FILE *fp;
    char ch;

    if((fp=fopen("case1.in.txt","r"))==NULL)
        return 0;
    while((ch=fgetc(fp))!=EOF)
    {
        if ('A'<=ch && ch<='Z')
            ch = ch + 32;
        putchar(ch);
    }
    fclose(fp);
}
